The invention relates to a self-oscillation pulsed liquid-gas jet pump. The jet pump comprises an upper nozzle, a self-oscillation cavity, a collision body, a lower nozzle, a suction chamber, a throat pipe and a diffusion tube, wherein the upper nozzle, the self-oscillation cavity, the collision body and the lower nozzle are connected sequentially to form a self-oscillation pulsed jet nozzle; after passing through the self-oscillation pulsed jet nozzle, a main jet flow of high-pressure liquid is modulated into a pulsed jet flow and enters the suction chamber of a liquid-gas jet pump; and gas is introduced under the action of jet turbulent diffusion, and boosted and exhausted through the diffusion tube after mixing and energy exchange in the throat pipe. The self-oscillation pulsed liquid-gas jet pump has the advantages that the self-oscillation pulsed jet nozzle and the liquid-gas jet pump are combined, and the main jet flow is changed into pulsed jet flow through the self-oscillation pulsed jet nozzle, so that the mass transfer capability of the main jet flow is improved, and the efficiency of the liquid-gas jet pump is improved. The device is not provided with a motion part, simple in structure and reliable in operation, and is suitable for waste gas absorption and treatment, oil and gas exploitation, vacuumization, aeration and other application situations.